Machine for turning round tenons



(Mo'del.) G.l W'l FOSKETT 2Sheets-Sheet 1. MACHINE FOR TURNING ROUND TBNONS. No. 278,118. Patented May 22,1883.

TORNEYS.

N. PETERSA Phamuxmgnpmr. wuhngmn. D. C.

(Model.) G W `FOSKETT 2 Sheets-Sheet 2. MACHINEy FOR TURNING ROUND TENONS.

No. 278,118. Patented May 22,1883.

jINVENTOR BY Mm ATTORNEYS.

N. PEYERS. Pham-Lilmgmphnf washmgu-m D. c.

UNITED STATES PATENT OEEICE.

GEORGE W. FOSKETT, OF WINOHENDON, MASSACHUSETTS.

MACHINE FOR TURNING ROUND TENONS.

.SPECIFZIICATION formingpart of Letters Patent No. 278,118, dated May 22, 1883.

' Application filed February 26,1883. (Model.)

. '.lenons, of which the following is a full, clear,

and exact description. y y

Myimprovementsrelate to machinesfor forming tenons ou chair-legs or forming round tenons on'other articles; land the invention con- Vsists in the combination of rotary clutches for carrying the work to the cutters, revolving chucks carrying the tenoning-cutters, and saws for cutting the legs or other articles to uniform length, together and with mechanism for regulating the length of the tenou and for effecting the successive operations automatically, as hereinafter set forth and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a plan view ofthe machine. Fig. 2 is an end elevation of the same. Fig. 3 isa. longitudinal section on line w w of Fig. 1, and Fig. 4 is a vertical cross-section on line y y of Fig. l.

The operative mechanism is carried by a frame or stand, A, which is provided with a main driving-shaft, a,- to which power is to be applied, and;with a secondary shaft, a', thatis vconnected by belt to the shaft a.`

Upon the top of the frame, supported by boxes b at its ends, is a shaft, l), carrying two clutch-wheels, B B, that are fitted at regular intervals in their faces with clutches c, which, as shown, are fourin number.' The clutchesc are transversely-slotted blocks contained in recesses formedin periphery ot' the wheels B, and carried by stems c', that extend to the hubs of the wheels, in which they are stepped loosely,

so as to allow a turning movement of the clutches. The stems c carry spiral springs d, that tend to turn and retain the clutches with their slots inclined to the axis of the wheels, and thereby cause the clamping of any article in the clutches against the open sides of the recesses containing the clutches.

Upon the stem of each clutch is a projecting pin, d', and attached to frame A are curved plates or segments e, placed to strike the pins d', and thereby turn the clutches to their open position and retain them thus for about aquarter of a revolution ofthe clutch-wheels, or uutil the clutches reach the lower end of a hopper or table, c', fixed on the frame.

In front of wheels B B, and above the table e', is a shaft, f, supported by standards j" and carrying saws g g, one at the outer side of each wheel B, the saws being attached to collars g, adjustable on the shaft, so that the distance between the saws may be adjusted.

Upon the frame, at the side of shaftbopposite to that ou which the hopper is placed, are chucks h h, carried by shafts sustained on crossheads i z', which are fitted in ways h', that per- 'mit the chucks to move to and from the sides of the wheels B. The two crossheads i are connected for simultaneous movement by a lever, t2, and rod fi. The ways 71,', carrying the chuck at one end of the frame A, are sustained on a table or frame, k, that is fitted to slide endwise of the main frame on ribs k', and the table is adjustable by a hand-screw, l, Vso that by moving the table the normal distance between the two chucks is varied, according to the length of the articles being operated upon. A spring. or springs, l', connected to the crossheads i, act to retain the heads in the outward position. The saw-shaftf and the shafts carryin g the chucks t' are driven by belts directly from the main shaft a. The clutch-wheel shaft b has a gear-wheel, m, at one end, engaging a mutilated gear, u, mounted on a stud, and the wheel n is rotated from a gear-wheel, o, on the secondary shaft a', through the medium ofintermediate wheels, o a; The mutilated wheel n is toothed to give the shaft b a quarter-rotation intermittently, and is provided at oneside with an inclined lug or projection, p, for taking against an arm, p', which is attached by a screw, so as to be adjustable on the cross-head t' at that end of the frame, so that at each revolution of wheel u, and consequently at each quarter-revolution of shaft b, the two slides or heads @',with the chucks,will be caused to move inward by action of projection p, and then outward by action ofthe spring. The chucks will carry cutters of suitable character for forming the tenons. Preferably the arm p will be provided with a friction-roller to'take against the cam p. y

In theoperation of the machine the chairlegs or similar articles are placed on the in- ICO a I l f 278,11@

g, thereby causing the legs to be cut uniformv in length. At the pauses in the rotation ofthe clutch-wheels the legs are brought in succes-v sion in line with the chucks h, andas each leg is thus brought into position the inclined projection onthe mutilated wheel u moves the chucks inward and upon the ends ofthe legs, and the cutters form the tenons. The chucks then withdraw, the leg is carried down with the wheels, and, the pins reaching segments e, the clutches are opened, and the 'finished leg drops out. By adjustment of the arm p' on head1' to or from the projeetionp the extent of endwise movement ofthe chucks is varied and the length ot' the tenons thus regulated. For

long work the table 7c is to be moved outwardl 'by means ot' screw Z, and the two cross-headsi thus drawn apart, and by the same means they can be moved inward to suit the length of thelegs or other articles being operated upon.

In place of using the gearing for rotating the clutch-wheels, the shaft may carry a disl;

friction, the pins on the clutches takin g against the segments may be provided with rollers.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with the curved plates e, of the rotary wheels B, having transverse slotted blocks c in recesses at regular intervals on their peripheries, stems c', loosely stepped in their hubs, the pins d', and the spiral springs d, as and i'or the purpose described.

2. 4The combination,with Wheels B, carrying clutches, and the curved plates c, of the saws g and cutter-carrying chucks h, the latter arranged to move to or from the wheels, as described.

3. The combination, with the clutch-wheel shaft b, of the gear-wheel m, having lugp, the mutilated gear-wheel u, the gear-wheels o o n', and the cross-heads fi, having arm 19', as shown and described.

GEORGE W. FOSK ETT. 

